Overview of solar photovoltaic (PV) systems, including components, functionality, and benefits of using solar energy.
Introduction to Solar Photovoltaic (PV) Systems
Designed as a quick‑reference guide for students, technicians, and anyone new to solar power.
| Term | Definition |
|---|---|
| Photovoltaic (PV) | Direct conversion of sunlight into electricity using semiconductor materials. |
| Solar PV System | A collection of components that capture solar energy, convert it to DC electricity, and deliver usable power to a load or the grid. |
| Grid‑connected vs. Off‑grid | Grid‑connected: feeds excess power to the utility and draws power when needed. Off‑grid: operates independently, typically with battery storage. |
| Component | Function | Typical Specs / Options |
|---|---|---|
| Solar Modules (Panels) | Convert sunlight to DC electricity. | Monocrystalline, polycrystalline, thin‑film; 250‑600 W per panel. |
| Mounting Structure | Secure panels at optimal tilt/azimuth. | Fixed‑tilt, adjustable, tracking (single/dual axis). |
| Inverter | Converts DC → AC; may also perform MPPT (Maximum Power Point Tracking). | String inverter, micro‑inverter, power‑optimiser, hybrid inverter. |
| Combiner Box | Joins strings of modules; houses fuses/MCBs. | Rated for system voltage (e.g., 600 VDC). |
| DC Disconnect | Provides a safe means to isolate the DC side. | Rated for max current & voltage. |
| AC Disconnect | Isolates the AC side from the building or grid. | Typically 30 A–60 A, UL‑listed. |
| Charge Controller (off‑grid) | Regulates battery charging, prevents over‑charge/discharge. | PWM or MPPT; sized to handle array current. |
| Battery Bank (off‑grid) | Stores excess energy for later use. | Lead‑acid, Li‑ion, flow; rated in Ah/kWh. |
| Monitoring System | Tracks performance, alerts faults. | Web‑based portal, mobile app, data logger. |